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to a higher load resistor value in those cases. Place the shorting bar
between pins 2 & 3 and try calibrating again. In this case the OP-
B885CZ only needs to reach an Ic (ON) value of 2.5V / 10K = 0.25mA
to calibrate. We could have suggested the 10K load resistor to begin
with, but this exercise can show the importance of matching the
phototransistor load resistance to data sheet specifications of the par-
ticular sensor being interfaced to the OCB100CZ.
An example of an application where the OPB885Z could be used
in combination with the OCB100CZ would be where a semi-opaque
or semi-transmissive material needs to be sensed. Since the material
does not block all of the light, the sensor might see through the mate-
rial and not be able to detect its presence. The OCB100CZ solves this
problem by calibrating the sensor output at a level slightly higher than
the detection trip point. If the material to sense is 50% transmissive
or less, it will be sensed.
Another example would be when the difference in two semi-
transmissive materials needs to be detected, such as in a label
printer where a sensor is required to see through the liner of a roll of
labels, but detect the label. A sample label / liner is included in this
OCB100-KIT. Try the following experiment:
Insure that the shorting bar is placed between pins 2 & 3 to set
the load resistor at approximately 10K ohms. Place the gap between
the two labels in the center of the optical path. Calibrate the sensor.
Now move the labels back and forth in the gap to see that the green
LED lights when the labels are present, but does not light when the
label is present. Remove the label / liner from the gap completely.
The blue light of the OCB100CZ should now be lit.
OPTEK gives you the tools to help you take your ideas to market.
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相关代理商/技术参数
OCB100-KIT 制造商:TT Electronics / OPTEK Technology 功能描述:Auto-Calibration Design Kit
OCB-1250 制造商:Heyco Products Inc 功能描述:
OCB-1375 制造商:Heyco Products Inc 功能描述:
OCB-1500 制造商:Heyco Products Inc 功能描述:
OCB350L062Z 功能描述:光学开关（透射型，光电晶体管输出） Calibration Circuit With OPB350L062 RoHS:否 制造商:Omron Electronics 输出设备:Phototransistor 槽宽:3.4 mm 光圈宽度:0.5 mm 集电极—发射极最大电压 VCEO:30 V 最大集电极电流:20 mA 正向电流: 安装风格:Through Hole 最大工作温度:+ 85 C 最小工作温度:- 25 C 封装:
OCB350L125Z 功能描述:光学开关（透射型，光电晶体管输出） Calibration Circuit With OPB350L125 RoHS:否 制造商:Omron Electronics 输出设备:Phototransistor 槽宽:3.4 mm 光圈宽度:0.5 mm 集电极—发射极最大电压 VCEO:30 V 最大集电极电流:20 mA 正向电流: 安装风格:Through Hole 最大工作温度:+ 85 C 最小工作温度:- 25 C 封装:
OCB350L187Z 功能描述:光学开关（透射型，光电晶体管输出） Calibration Circuit With OPB350L187 RoHS:否 制造商:Omron Electronics 输出设备:Phototransistor 槽宽:3.4 mm 光圈宽度:0.5 mm 集电极—发射极最大电压 VCEO:30 V 最大集电极电流:20 mA 正向电流: 安装风格:Through Hole 最大工作温度:+ 85 C 最小工作温度:- 25 C 封装:
OCB350L250Z 功能描述:光学开关（透射型，光电晶体管输出） Calibration Circuit With OPB350L250 RoHS:否 制造商:Omron Electronics 输出设备:Phototransistor 槽宽:3.4 mm 光圈宽度:0.5 mm 集电极—发射极最大电压 VCEO:30 V 最大集电极电流:20 mA 正向电流: 安装风格:Through Hole 最大工作温度:+ 85 C 最小工作温度:- 25 C 封装: